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Finding the Fourth Proportional to 1,764.16, 2,645.04 and 789.76

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Solution

The fourth proportional to 1,764.16, 2,645.04 and 789.76 is: 1,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.16 : 2,645.04 = 789.76 : x
  2. Step 2: Convert to fraction form
    1,764.16/2,645.04 = 789.76/x
  3. Step 3: Cross multiply
    1,764.16x = 2,645.04 × 789.76
  4. Step 4: Simplify right side
    1,764.16x = 2,088,946.79
  5. Step 5: Solve for x
    x = 2,088,946.79/1,764.16
  6. Step 6: Final answer
    x = 1,184.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.